It is currently Wed Oct 23, 2019 6:11 pm

Click the link below to visit the site sponsor

The Ham Radio Shop




Post new topic Reply to topic  [ 8 posts ] 
 ANOTHER ANTENNA IN THE BUILDING STAGES 
Novice Member

Joined: Wed Jun 27, 2018 7:00 am
Posts: 48
Location: Saltash Cornwall
Feedback: 0 (0%)
Reply with quote
Post ANOTHER ANTENNA IN THE BUILDING STAGES
:shock:

Morning folks were at it again.

Another portable antenna a Inverted V Tri band linked 80 40 and 20m with 80m loading coils and taking the design one further with 160m coils.

Will do the basic design first and get that operational and then think about the 160m coils. :yahoo:

Leads me to a question :blonde

On the coils am using is .75mm insulated wire with 55 turns on a 40mm former waste pipe that is. Do i double that amount of turns to gain 1.93mhz or there about for me second loading coil that replaces the 80m coil when want to op on 160m :think:

And below is the picture of me first 80m coil 3.700mhz

Karl 2E0FEH


Attachments:
File comment: NO1 OF TWO 80M COILS
SAM_0450__1556348595_57793.jpg
SAM_0450__1556348595_57793.jpg [ 29.46 KiB | Viewed 963 times ]
Sat Apr 27, 2019 7:13 am
Profile Send private message WWW

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Advanced Member
User avatar

Joined: Sun Jul 05, 2009 8:29 pm
Posts: 377
Location: Nottingham.IO92KX
Feedback: 17 (100%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
Inductance coil calculator...
http://www.66pacific.com/calculators/co ... lator.aspx

Really useful site.

_________________
Jes - M0JSW


Sat Apr 27, 2019 9:41 am
Profile Send private message

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Novice Member

Joined: Wed Jun 27, 2018 7:00 am
Posts: 48
Location: Saltash Cornwall
Feedback: 0 (0%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
YET TOO ON AIRED TESTED :good:

to wet windy mess around today all being well tomorrow get this puppy airborne :yahoo:


Attachments:
SAM_0452__1557405682_38765.jpg
SAM_0452__1557405682_38765.jpg [ 39.62 KiB | Viewed 832 times ]
Thu May 09, 2019 1:09 pm
Profile Send private message WWW

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Advanced Member
User avatar

Joined: Sat Feb 25, 2012 7:07 pm
Posts: 11333
Location: Workington, Cumbria.
Feedback: 4 (100%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
Leads me to a question:
Are these supposed to be 'loading coils', or traps?

_________________
Chris.


Thu May 09, 2019 1:16 pm
Profile Send private message

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Novice Member

Joined: Wed Jun 27, 2018 7:00 am
Posts: 48
Location: Saltash Cornwall
Feedback: 0 (0%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
LOADING NOT TRAPS :hello:


Wed Jun 19, 2019 12:08 pm
Profile Send private message WWW

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Novice Member

Joined: Wed Jun 27, 2018 7:00 am
Posts: 48
Location: Saltash Cornwall
Feedback: 0 (0%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
Right this is more of update what trying to do making a inverted V Tri band antenna the 40m 20m and 80m with loading coils.

The 20m and 40m is nice and res with no add of ATU. :clapping:

Now built the 80m coils after the last coils after did failure. :shock: :cry:

ALL so must buy a LCR meter well handy after working out the lengths of wire and then work out how much Uh required with former Dia etc. wound the formers with the .77mm wire to what they calucatuon worked out then attach the LCH meter and tune the coils in as close as possible to the Uh required got it in with in .7% of the Uh target on both coils. :shock:

One day shortly and sting you the antenna and do some antenna testing with the Sark 100 and on air. All being well and get out out portable and get it on air :yahoo:


next job make a vertical 10m 160m portable antenna with 160m loading coil but going to make a coil winder first :-)

2E0FEH


Attachments:
SAM_0530__1566633063_50614 (1).jpg
SAM_0530__1566633063_50614 (1).jpg [ 71.91 KiB | Viewed 249 times ]
SAM_0535__1567681418_95967.jpg
SAM_0535__1567681418_95967.jpg [ 39.15 KiB | Viewed 249 times ]
Thu Sep 12, 2019 1:02 pm
Profile Send private message WWW

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Contributor 2019
User avatar

Joined: Tue Oct 09, 2012 1:09 pm
Posts: 10313
Location: West Midlands
Feedback: 99 (100%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
M3FEH wrote:

One day shortly and sting you the antenna and do some antenna testing


I'm not picking, but I find some difficulty in understanding that, it is almost like google translate has been used to translate another language into English.

Just trying to see what you are saying :)

_________________
===================
Gee Three Eee Jay Ess - RSGB, SARL, G-QRP, EPC
===================


Thu Sep 12, 2019 4:25 pm
Profile Send private message

 ANOTHER ANTENNA IN THE BUILDING STAGES 
Novice Member

Joined: Wed Jun 27, 2018 7:00 am
Posts: 48
Location: Saltash Cornwall
Feedback: 0 (0%)
Reply with quote
Post Re: ANOTHER ANTENNA IN THE BUILDING STAGES
Opps

fat fingers soz LOL

Basically its string the antenna up in garden to which i did other day, mainly to test out the 80m side of it and its working well putting in good signals into East Dorset from East Cornwall.

So 20m is resonate, 40m is also via the links. And the loading coils does most of the 80m band with ease applying the MFJ939 via the FT857d. Plus one can take one of the Elements add the CP wires to the FP if room not allow bigger antennas on site as plan to op more from me M/C next year portable.

Happy with that look forwards to getting out portable and fire it up on air some where in the wilds of Cornwall along with the LF Inverted L portable i have as well.

Now must get on with the loading coil for the 160m vertical am doing again for portable.


Sat Sep 21, 2019 7:49 am
Profile Send private message WWW
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB © phpBB Group.
Designed by Vjacheslav Trushkin for Free Forums/DivisionCore.